Fitness rig



FIG. 1 is a top, front, right perspective view of a fitness rig showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines immediately adjacent to the shaded areas define the bounds of the claimed design and form no part thereof. The broken lines depicting the remainder of the fitness rig show features that form no part of the claimed design. 

CLAIM The ornamental design for a fitness rig, as shown and described. 